New number-related #gogen Go (#golang) package:

* #phonekeypad (https://pkg.go.dev/github.com/tecnickcom/gogen/pkg/phonekeypad): Quick functions to convert raw phone numbers strings to sequences of numbers corresponding to a standard phone keypad. For example the phone number string "1-999-EXAMPLE" gets converted to "[1 9 9 9 3 9 2 6 7 5 3]". Extra symbols are automatically removed.